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Benchmarks

redact-secret · Report

Prefix-less 32-8-8 hex key triplet

Dash-segmented 32-8-8 lowercase hex triplet that both pinned tools match and three sources describe as the newer private API key; recognized only beside a same-line mailgun keyword.

  • Mailgun
  • Detectors: none mapped
  • Run 2026-10-07
  • Mode published · redact-secret 0.1.0-beta.14
All providers
  • Dossier verdictReady
  • Dossier evidence levelT2 · Tool-corroborated
  • Dossier researched2026-09-29
Beta.8 context-gated arrival family mailgun-api-key-triplet (#259). Since redact-secret#701 (#773, registry pinned at 3144bb3) the product mailgun-api-key detector also reports this shape under mailgun_api_key, inside the shared detector. It is no longer treated as a superseded legacy signing key: no issued key has been observed and the role is recorded uncertainty.

Research record

From credential-evidence snapshot-2026.10.06.4 · records at 77ce761 · schema 1.8.0. It describes the research on the format, not what any scanner or the product does, and not a support status.
  • Review stateDraft, not reviewed
  • Format revision1 · current
  • ResearchResearched
  • Researched2026-09-29

3 events in the review history: 2 observed, 1 reviewed. Latest: observed on 2026-09-29 by automation, project maintainer. Project-maintained review is not independent validation. The family record at this release.

Format

Provider format research from credential-evidence snapshot-2026.10.06.4 · records at 77ce761 · schema 1.8.0.

What it looks like

Descriptive pattern
^[0-9a-f]{32}-[0-9a-f]{8}-[0-9a-f]{8}$

Parts are shown as recorded. Evidence classes belong to the facts below; no class is assigned to a part.

Format facts

Open questions

No open question is recorded for this revision.

Benchmark dossier notes

From the provider dossier, as written. The evidence level above says how well the format is backed; a fact the dossier does not record is not shown.
Shape
dash-separated lowercase hex groups of 32, 8 and 8 characters, without a prefix. The taxonomy id says "legacy signing key", but three sources describe it as the newer private API key: a Mailgun-repo contributor (2019), customer reports (2018) and a trufflehog issue (2025). Both pinned peers match the shape. No issued key has been observed.
Basis
T2 by scanner rules; no provider text. This family carries no frontmatter sources because the rule links reviewed are version tags, not permalinks.
Contract in core
#701 made the product's mailgun_api_key detector also report this shape, inside the shared detector; see detector-families.md. The #1012 confirm-only pass records it OWNED-ELSEWHERE (mailgun-api-key, type mailgun_api_key): medium when mailgun appears on the same line, high under a Mailgun-named key. No new contract is proposed.

In this benchmark

Fixture rows on the current run. Counts are for redact-secret in published · redact-secret 0.1.0-beta.14 mode.

No fixtures in this family yet

Nothing in the corpus targets it, so nothing is measured and no coverage is claimed.

Not measured

Benchmark dossier questions

Things the sources do not settle. They are listed so nobody reads them as settled.
Open caveat
No provider source shows the 32-8-8 shape and its role is unresolved (current private API key or superseded signing key); two scanner rules and three prose sources describe it. Needs one issued key.

Looks like it, but isn't

Values the dossier records as resembling this credential without being one.
Collisions
an unrelated 32-8-8 hex value is not a credential; the shape is recognized only beside a mailgun keyword.

Scanner rules for this family

Mapped by hand (reviewed 2026-09-30) from each scanner's pinned rule file, never from what a scanner found on the fixtures.
Peer scanner rules that target this family
ScannerRuleWhat the rule matches
gitleaks · rules 8.30.1mailgun-signing-keymailgun keyword + 32-8-8 hex triplet
trufflehog · rules 3.97.4mailgunkey- + 32 characters, or a 32-8-8 hex triplet

No rule maps to this family in flare-redact, openredaction.

0 of 0 rows

No fixtures in this family yet

Nothing in the corpus targets it, so nothing is measured and no coverage is claimed.

Not measured

Sources

Researched 2026-09-29.

Documentation and code

  • github.com/gitleaks/gitleaks/blob/v8.30.1/config/gitleaks.toml
  • github.com/trufflesecurity/trufflehog/issues/3870

Research log

Other Mailgun families